논문 (학술지)
Physiological and Molecular Processes Associated with Long Duration of ABA Treatment
| 등록번호 | RPMS-2018-0190691575 | SCI 구분
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※구분 : SCI(SCIE포함), 비SCI |
SCI |
|---|---|---|---|
| 저자명 (주·공동저자) | Wang Mei; Lee Juhun; Choi Bongsoo; Park Youngmin; Sim Hee-Jung; Kim Hyeran; Hwang Inhwan | ||
| 논문구분 | 국외전문학술지 | 학술지명 | FRONTIERS IN PLANT SCIENCE |
| ISSN | 1664-462X | 학술지 출판일자 | - |
| 학술지 볼륨번호 | 9 | 논문페이지 | ARTN176 ~ - |
| 학술지 임팩트팩터 | 4.291 | 기여율 | 50 % |
| DOI | 10.3389/fpls.2018.00176 | ||
| 초록 | Plants need to respond to various environmental stresses such as abiotic stress for proper development and growth. The responses to abiotic stress can be biochemically demanding, resulting in a trade-off that negatively affects plant growth and development. Thus, plant stress responses must be fine-tuned depending on the stress severity and duration. Abscisic acid, a phytohormone, plays a key role in responses to abiotic stress. Here, we investigated time-dependent physiological and molecular responses to long-term ABA treatment in Arabidopsis as an approach to gain insight into the plant responses to long-term abiotic stress. Upon ABA treatment, the amount of cellular ABA increased to higher levels, reaching to a peak at 24 h after treatment (HAT), and then gradually decreased with time whereas ABA-GE was maintained at lower levels until 24 HAT and then abruptly increased to higher levels at 48 HAT followed by a gradual decline at later time points. Many genes involved in dehydration stress responses, ABA metabolism, chloroplast biogenesis, and chlorophyll degradation were strongly expressed at early time points with a peak at 24 or 48 HAT followed by gradual decreases in induction fold or even suppression at later time points. At the physiological level, long-term ABA treatment caused leaf yellowing, reduced chlorophyll levels, and inhibited chloroplast division in addition to the growth suppression whereas short-term ABA treatment did not affect chlorophyll levels. Our results indicate that the duration of ABA treatment is a crucial factor in determining the mode of ABA-mediated signaling and plant responses: active mobilization of cellular resources at early time points and suppressive responses at later time points. | ||
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